Bandwidth part switching method and apparatus

Abstract

This application provides a bandwidth part switching method and an apparatus. The method includes: A network device sends first downlink control information DCI to a terminal, where a first indication field in the first DCI indicates a first cell, no bandwidth part BWP whose BWP identifier is a value of a BWP indicator field in the first DCI is configured in the first cell, and the first indication field indicates one or more cells for data transmission. The network device performs data transmission with the terminal on a first BWP, where the first BWP is one of BWPs configured in the first cell.

1 . A method, comprising:
 receiving first downlink control information (DCI), wherein a first indication field in the first DCI indicates a first cell, wherein no bandwidth part (BWP) whose BWP identifier is a value of a BWP indicator field in the first DCI is configured in the first cell, and wherein the first indication field indicates one or more cells for data transmission; and   performing data transmission on a first BWP, wherein the first BWP is a BWP configured in the first cell.   
     
     
         2 . The method according to  claim 1 , wherein three BWPs are configured in the first cell, the three BWPs comprising a BWO  0  , a BWP  1 , and a BWP  2 , and wherein, when a value of a bit sequence of the BWP indicator field is “11”, the first BWP is any one of the BWP  0 , the BWP  1 , and the BWP  2 . 
     
     
         3 . An apparatus, comprising:
 at least one processor; and   one or more non-transitory memories storing programming instructions that are executable by the at least one processor to perform:
 receiving first downlink control information (DCI), wherein a first indication field in the first DCI indicates a first cell, wherein no bandwidth part (BWP) whose BWP identifier is a value of a BWP indicator field in the first DCI is configured in the first cell, and wherein the first indication field indicates one or more cells for data transmission; and 
 performing data transmission on a first BWP, wherein the first BWP is a BWP configured in the first cell. 
   
     
     
         4 . The apparatus according to  claim 3 , wherein three BWPs are configured in the first cell, wherein the three BWPs comprise a BWP  0 , a BWP  1 , and a BWP  2 , and wherein, when a value of a bit sequence of the BWP indicator field is “11”, the first BWP is any one of the BWP  0 , the BWP  1 , and the BWP  2 . 
     
     
         5 . An apparatus, comprising:
 at least one processor; and   one or more non-transitory memories storing programming instructions that are executable by the at least one processor to perform:
 sending first downlink control information (DCI), wherein a first indication field in the first DCI indicates a first cell, wherein no bandwidth part (BWP) whose BWP identifier is a value of a BWP indicator field in the first DCI is configured in the first cell, and wherein the first indication field indicates one or more cells for data transmission; and 
 performing data transmission on a first BWP, wherein the first BWP is a BWP configured in the first cell. 
   
     
     
         6 . The apparatus according to  claim 5 , wherein three BWPs are configured in the first cell, wherein the three BWPs comprise a BWP  0 , a BWP  1 , and a BWP  2 , and wherein, when a value of a bit sequence of the BWP indicator field is “11”, the first BWP is any one of the BWP  0 , the BWP  1 , and the BWP  2 . 
     
     
         7 . The apparatus of  claim 5 , wherein the BWP indicator field includes  2  bits, and wherein the first BWP is determined according to 1 least significant bit. 
     
     
         8 . The apparatus of  claim 5 , wherein a BWP identifier of the first BWP is determined based on the value of the BWP indicator field and a total quantity of BWPs configured for the first cell. 
     
     
         9 . The apparatus of  claim 5 , wherein the instructions are further executable by the at least one processor to perform sending radio resource control (RRC) that indicates BWPs that are configured on the first cell and that respectively correspond to a plurality of values of the BWP indicator field, wherein the BWP that is configured on the first cell and that corresponds to the value of the BWP indicator field is the first BWP. 
     
     
         10 . The apparatus of  claim 5 , wherein a mapping relationship between the BWP indicator field and the BWP configured on the first cell is explicitly indicated. 
     
     
         11 . The method of  claim 1 , wherein the BWP indicator field includes 2 bits, and wherein the first BWP is determined according to 1 least significant bit. 
     
     
         12 . The method of  claim 1 , wherein a BWP identifier of the first BWP is determined based on the value of the BWP indicator field and a total quantity of BWPs configured for the first cell. 
     
     
         13 . The method of  claim 1 , further comprising sending radio resource control (RRC) that indicates BWPs that are configured on the first cell and that respectively correspond to a plurality of values of the BWP indicator field, wherein the BWP that is configured on the first cell and that corresponds to the value of the BWP indicator field is the first BWP. 
     
     
         14 . The method of  claim 1 , wherein a mapping relationship between the BWP indicator field and the BWP configured on the first cell is explicitly indicated. 
     
     
         15 . The apparatus of  claim 3 , wherein the BWP indicator field includes 2 bits, and wherein the first BWP is determined according to 1 least significant bit. 
     
     
         16 . The apparatus of  claim 3 , wherein a BWP identifier of the first BWP is determined based on the value of the BWP indicator field and a total quantity of BWPs configured for the first cell. 
     
     
         17 . The apparatus of  claim 3 , wherein the instructions are further executable by the at least one processor to perform receiving radio resource control (RRC) that indicates BWPs that are configured on the first cell and that respectively correspond to a plurality of values of the BWP indicator field, wherein the BWP that is configured on the first cell and that corresponds to the value of the BWP indicator field is the first BWP. 
     
     
         18 . The apparatus of  claim 3 , wherein a mapping relationship between the BWP indicator field and the BWP configured on the first cell is explicitly indicated.